Avast scanner not working on Jotti

Each time I go to Jotti, I see Avast not detecting any malware, even the one detected by all other AVs. An example pic is here. I think Avast is no more working on Jotti. I noted it since many weeks. Any ideas?

I received a reply to the e-mail that I sent to their feedback e-mail.

AVG does not detect the (unarchived) eicar.com on the Linux platform, which is an issue we reported to the manufacturer a while ago. Please try embedding it inside a zip or rar archive to see that it will show up detected this way (indicating the signature is correct and the product itself is working).

The Avast product is having some problems with its updater lately, which are hard to debug. We are working on the problem, but it is rather hard to track down.

F-Secure detects eicar.com three times because, as you may be aware, F-Secure uses three engines for detecting viruses. All three engines detect the sample, as follows: